From fccfb9ce70ed4ea7a145f77b86de62e38178517f Mon Sep 17 00:00:00 2001
From: Dragos Bogdan <dragos.bogdan@analog.com>
Date: Tue, 19 Mar 2019 12:47:00 +0200
Subject: [PATCH] iio: ad_sigma_delta: select channel when reading register
Git-commit: fccfb9ce70ed4ea7a145f77b86de62e38178517f
Patch-mainline: v5.1-rc6
References: bsc#1051510

The desired channel has to be selected in order to correctly fill the
buffer with the corresponding data.
The `ad_sd_write_reg()` already does this, but for the
`ad_sd_read_reg_raw()` this was omitted.

Fixes: af3008485ea03 ("iio:adc: Add common code for ADI Sigma Delta devices")
Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/iio/adc/ad_sigma_delta.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index ff5f2da2e1b1..54d9978b2740 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -121,6 +121,7 @@ static int ad_sd_read_reg_raw(struct ad_sigma_delta *sigma_delta,
 	if (sigma_delta->info->has_registers) {
 		data[0] = reg << sigma_delta->info->addr_shift;
 		data[0] |= sigma_delta->info->read_mask;
+		data[0] |= sigma_delta->comm;
 		spi_message_add_tail(&t[0], &m);
 	}
 	spi_message_add_tail(&t[1], &m);
-- 
2.16.4